Harness stop motion for automatic textile looms



y 3, 1955 I H. P. BAILEY El Al. 7 2,707,497

HARNESS STOP MOTION FOR AUTOMATIC TEXTILE LOOMS Filed March 12, 1954 2 Shets Sheet 1 mumm1muuummmrmmm lllllllllllllllllllllllmllllll Q I J F Z2 2/ L 4 lkza 20 /4 Z I /3 INVENTORS Me'eMA/v P. 54/4 EY,

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May 3, 1955 H. P. BAILEY El AL 2,707,497

HARNESS STOP MOTION FOR AUTOMATIC TEXTILELOOMS Filed March 12,. 1954 2 Sheets-Sheet 2 FIG. 4.

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States HARNESES STGP MOTION FOR AUTOMATIC TEXTILE LOOMS Herman P. Bailey and Travis E. Smith, .lr., Miiledgeville, Ga.

Application March 12, 1954, Serial No. 415,830

4 Claims. (Cl. 133-337) matically stop the loom in the case of breakage of a harness cord, said device being simple in construction, being easy to install, and being reliable in operation.

A further object of the invention is to provide an improved harness stop motion attachment for a loom which involves inexpensive components, which is arranged to automatically stop the loom in the event any one of the harness cords breaks, and which is arranged to maintain the loom in an inoperative condition until the stop motion device is manually released.

Further objects and advantages of the invention will become apparent from the following description and claims, and from the accompanying drawings, wherein:

Figure 1 is a fragmentary side elevational view, partly in longitudinal cross section, of a portion of a loom provided with an improved harness stop motion device according to the present invention.

Figure 2 is a transverse vertical cross sectional view taken on the line 22 of Figure 1.

Figure 3 is an enlarged vertical cross sectional detail view taken on the line 3--3 of Figure 2.

Figure 4 is an enlarged cross sectional detail view taken on the line 4-4 of Figure 1. I

Figure 5 is an enlarged top plan detail view showing the supporting assembly for one of the harness stop motion switch devices, said view being taken on the line 5-5 of Figure 1.

Figure 6 is a schematic wiring diagram showing the electrical connections of the circuit of the stop motion device of Figures 1 to 5.

Referring to the drawings, 11 generally designates a loom of conventional construction comprising the longitudinal parallel top frame elements 12, 12, the longitudinal frame elements 13, the transverse frame elements 14, connecting the longitudinal frame elements 13, and the vertical frame elements 15 and 16, forming part of the conventional loom. Designated at 17 are a plurality of harness members arranged in parallel adjacent positions and supported by upper harness cords 18 which are engaged over pulleys 19, as shown in Figure 1, and held down by lower harness cords 20, as shown. The arrangement of the harness members 17 and the harness cords 18 and 20 is conventional and forms no part of the present invention.

it will be seen from Figure 1 that the transverse frame members 14, 14 extend transversely beneath respective end portions of the parallel harness members 17. Secured to each of the transverse frame members 14 are a pair of arcuate, upwardly curved rods 21, 21, the top ends of the rods being connected by a plate member 22 which is substantially horizontal but which extends transversely beneath the end portions of the harness members 17. The plate members 22 are formed at their end portions 2,707,497 Patented May 3, 1955 with upstanding lugs 23, 23. Designated at 24 is an angle bar of substantial length to which is rigidly secured the respective apertured lugs 25, 25 extending inwardly adjacent to and hingedly connected to the lugs 23, 23 by a hinge rod 26. Mounted on the intermediate portion of each plate member 22 beneath the intermediate portion of the associated angle bar 24 is a bracket member 26' having a top arm 27 on which is mounted a normally open push button switch 28 having the vertical actuating button 29. As will be seen from Figure 3, the actuating button 29 is located immediately beneath a depending headed stud 30 carried by the angle bar 24.

The weight of the angle bar 24 is normally insufficient to close the push botton switch 28. However, when a harness cord 18 breaks, allowing a harness member 17 to descend and engage the underlying angle bar 24, the additional weight added by the harness member 17 is suflicient to close the push button switch 23. It will be understood that when a harness cord 18 breaks, the harness member 17 associated therewith will drop and engage one or both of the transversely extending angle bars 24, causing one or both of the push button switches 28 associated therewith to close.

Secured to the longitudinal top frame members 12 and depending therefrom are the bar members 31, 31 whose lower ends are connected by the transversely extending bar member 32. Secured to the intermediate portion of the transverse bar member 32 is the normally open switch 33 having the depending actuating button 34. Designited at 35 is a transverse bar member disposed below the transverse bar member 32 and supported therefrom by the bolts 36, 36, the bolts 36, 36 extending through the flanges 37 of the bars 31, which are rigidly secured, as by welding or the like, to the bar 32, extending through the bar 32, and being rigidly connected by nuts 38 to the bar 35. Respective coiled springs 39 are provided on the bolts 36, bearing between the upper nuts 38 and the bar 32, biasing the bar 35 downwardly. The bar 35 extends beneath the depending actuating element 34 of the switch 33, so that when one of the lower harness cords 20 breaks, the associated harness member 17 is free to move upwardly and will engage the bar 35 extending transversely thereover, causing the bar 35 to be moved upwardly and to engage the actuating element 34, closing the switch 33 at least momentarily.

Referring now to Figure 6, 4t and 41 designate the respective line wires of a low voltage current source, such as a twelve volt source. Designated at 42 is a stop motion solenoid for stopping the loom responsive to the energization thereof. As shown in Figure 6, the solenoid 42 has a movable armature 43 which is pivotally connected at 70 to a lever 71. Said lever 71 is pivotaily connected at 72 to the stop lever 73. When the solenoid 42 is energized, the armature 43 is elevated, which mechanically trips the stop lever 73, causing the loom to be stopped.

As shown in Figure 6, one terminal of the solenoid 42 is connected by a wire 47 to the line wire 4-1. The other terminal of the solenoid is connected by a wire 48 to a stationary contact 49 of a second solenoid 50. The solenoid 50 has the movable armature 51 provided with the insulating bar 52 carrying the respective contacts 53 and 54. The contact 53 is engageable with the stationary contact 49 when the solenoid 59 is energized, and is normally disengaged therefrom. The contact 53 is connected by a wire 55 to the line wire 40 through the normally closed contacts of a mechanical relay device 56. Said relay device 56 comprises a fixed contact 74 and a movable contact 75. The movable contact '75 is controlled by a lever 76 which acts to open contacts 75, 74 when the loom is not running.

One terminal of the solenoid St) is connected by a 3, wire 5'? to the line wire 4%. The other terminal of the solenoid is connected by a wire Sfi'to a wire 59. The respective switches 33 and 28 are connected in parallel between the wire and the line wire 41. The wire 'is connected tn-ongh a, normally closed push button switch 6% to a wire 61 which, in turn, is connected to a stationary contact 62 which is engageable by but which is normally separated from the contact 54-on the insulating bar 52. Stationary contact 52 is connected by a wire 63'tnrough a signal lamp ()4 to the line wire 40.

When any one of the switches 33 or 23, 23 is closed, as by the breaking of a harness cord, the solenoid 5'9 becomes energized by a circuit comprising the line wire iii, the 57, the soicnoid winding, the wire 53, the -wire 5?, the closed switch 33 or 28, and the line wire 41. This moves the armature 5 down causing the contact 54 to engage the contact 62 and the contact 53 to engage the contact 4?. The engagement of the contact 54' with the contact 62 tablishcs a holding circuit for the solenoid Stl comr g the wire 58, the normally closed switch 69, the wire 61, contacts 62 and 5 and a wire 65 connecting the contact 54 to the line wire d1. This maintains the solenoid 5t energized until the push button switch 66' is uatcd manually. The engagement of the contact 53 with the contact 45 energizes the solenoid 42 by a circuit comprising the line wire d1, the wire 47, the winding of the solenoid 4-2, the wire 43, contacts 49 and 53, the wire 55, the normally closed contacts of the relay 56, and the line wire 46. This energization of the solenoid i2 elevates the a mature 43, tripping the stop lever 73 and causing the loom to stop.

When the solenoid 59 becomes energized, the signal lamp 64 is energized by the closure of the contacts 54 and 6.1, establishing the energizing circuit for the lamp which com rises line wire 40, the lamp 64, the wire 63, the contacts 62 and 54, the wire 6%, and the line wire 41.

From the above it will be seen that the stop control solenoid 42 will become energized and will remain energized even if the switch 33 or 28 is only momentarily losed, as for example, when one of the tension harness cords 2t) breaks, causing the associated harness member to rise momentarily and engage the transversely extending bar member 35.

The control solenoid 42 will remain energized until the solenoid 50 is deenergized by manually opening the switch 60, which will be done after the broken harness cord is repaired.

Since the angle bar 24 is straight and will be mounted level, the harnesses must be kept level or the stop motion will stop the loom. This feature will prevent the weaving defect known as harness skip, namely, where an uneven harness allows the filling yarn to skip all the warp yarns controlled by that harness.

While a specific embodiment of an improved stop motion device for use with a loom has been disclosed in the foregoing description, it will be understood that no limitations be placed on the invention except as defined by the scope of the appended claims.

What is claimed is:

1. A stop motion device for use with a loom having a harness supported by harness cords on a frame, comprising a normally open switch having an actuating member to close said switch, means on said frame supporting said switch with said actuating member adjacent said harness in a position to be engaged by said harness responsive to the breaking of a harness cord, a current source, a stop motion control solenoid for stopping the loom responsive to the energization thereof, a second solenoid, circuit means connecting the winding of said second solenoid to said current source in series with the switch, a first set of normally open contacts controlled by said second solenoid and closed responsive to the energization of said second solenoid, circuit means connecting the winding of said first solenoid to said current source in series with said first set of contacts,

"it a second set of normally open contacts controlled by said second solenoid and closed responsive to the energization of said second solenoid, and circuit means conmeeting the winding of said second solenoid to said current source in series with said second set of contacts.

2. A stop motion device for use with a loom having a harness supported by harness cords on a frame, comprising a normally open switch having an actuating member to close said switch, means on said frame supporting said switch with said actuating member adjacent said harness in a position to be engaged by said harness responsive to the breaking of a harness cord, a current source, a Stop motion control solenoid for stopping the loom responsive to the energization thereof, a second solenoid, circuit means connecting the winding of said second solenoid to said current source in series with the switch, a first set of normally open contacts controlled by said second solenoid and closed responsive to the energization of said second solenoid, circuit means connecting the winding of said first solenoid to said current source in series with said first set of contacts, a second set of normally open contacts controlled by said second solenoid and closed responsive to the energization of said second solenoid, circuit means connecting the winding of said second solenoid to said current source in series with said second set of contacts, and a normally closed manual switch in said last-named circuit means.

3. A stop motion device for use with a loom having a harness supported by harness cords on a frame, com prising respective normally open switches, each having an actuating member to close it, means supporting the respective switches above and below the harness with the actuating members of the switches adjacent the harness in a position to be engaged by said harness responsive to the breaking of a harness cord, means connecting the switches in parallel, a current source, a stop motion control solenoid for stopping the loom responsive to the energization thereof, a second solenoid, circuit means connecting the winding of said second solenoid to said current source in series with the parallel-com nected switches, a first set of normally open contacts controlled by said second solenoid and closed responsive to the encrgization of said second solenoid, circuit means connecting the winding of said first solenoid to said current source in series with said first set of contacts, a second set of normally open contacts controlled by said second solenoid and closed responsive to the energization of said second solenoid, circuit means connecting the winding of said second solenoid to said current source in series with said second set of contacts, and a normally closed manual switch in said last-named circuit means.

4. In a stop motion device for use with a loom having a plurality of harness members in parallel adjacent positions supported by harness cords on a frame, respective normally open switches, respective movable switch actuating members arranged transverse to the top and bottom edges of the harness members and being engageable by a harness member responsive to the breaking of a harness cord, said normally open switches being arranged adjacent said actuating members and being arranged to be closed responsive to the movement of the actuating members, means connecting the switches in parallel, a current source, a stop motion control solenoid for stopping the loom responsive to the energization thereof, a second solenoid, circuit means connecting the winding of said second solenoid to said current source in series with the parallel-connected switches, a first set of normally open contacts controlled by said second solenoid and closed responsive to the energization of said'second solenoid, circuit means connecting the windingof said first solenoid to said current source in series with said. first set of contacts, a second set of normally open contacts controlled by said second solenoid and 5 closed responsive to the energization of said second solenoid, circuit means connecting the winding of said second solenoid to said current source in series with said second set of contacts, and a normally closed manual switch in said last-named circuit means.

References Cited in the file of this patent UNITED STATES PATENTS 6 Babb et a1. June 29, 1948 Svancarek Mar. 29, 1949 Jasmin et a1 Apr. 24, 1951 FOREIGN PATENTS Germany July 25, 1912 

